#page {
    width: 900px;
    /* 设置外边距 顺序为上 右 下 左*/
    margin: 10px auto 0px auto;
    /* 这是边框的宽度、样式、颜色*/
    border: 4px double #000;
}

.top {
    width: 100%;
    height: 70px;
    border-bottom: 4px double #000000;
    background-color: #FFFFFF;
}

.name {
    display: inline;
    float: left;
    width: 25%;
    font-size: 100%;
    padding-left: 10px;
    /* border: 1px solid #000000; */
    position: relative;
    top: 15%;
}

.request_banner {
    display: inline;
    float: left;
    position: relative;
    margin-left: 0px;
    margin-right: -90px;
    margin-top: 5px;
    top: 25%;
    font-size: 15px;
}

.welcome_banner {
    display: inline;
    float: right;
    position: relative;
    margin-left: 0px;
    /* margin-right: 2%; */
    margin-top: 15px;
    top: 10%;
    cursor: pointer;
    z-index: 100;
    width: 154px;
}

.login {
    display: inline;
    float: left;
    width: 10%;
    font-size: 50%;
    text-align: center;
    margin-left: 100px;
    /*border: 1px solid #000000;
	background-color: #98BF21;*/
    position: relative;
    top: 30%;
}

.register {
    display: inline;
    float: left;
    width: 10%;
    font-size: 50%;
    text-align: center;
    margin-left: 20px;
    /*border: 1px solid #000000;
	background-color: #98BF21;*/
    position: relative;
    top: 30%;
}

.bottom {
    border: 1px solid #000000;
    background-color: aliceblue;
}

.name>a:link,
.name>a:visited {
    color: black;
    font-weight: bold;
    font-size: 220%;
    text-align: center;
    text-decoration: none;
}


/* 选择鼠标指针浮动在其上的元素，并设置其样式*/

.name>a:hover,
.name>a:active {
    color: #FF6A00;
    text-decoration: none;
    border: none;
}

.login>a:link,
.login>a:visited {
    font-size: 250%;
    color: #000000;
    background-color: #FFFFFF;
    text-align: center;
    text-decoration: none;
}


/* 选择鼠标指针浮动在其上的元素，并设置其样式*/

.login>a:hover,
.login>a:active {
    font-weight: bold;
    color: #647BFF;
    border-bottom: solid 2px #000000;
    text-decoration: none;
}

.register>a:link,
.register>a:visited {
    font-size: 250%;
    color: #000000;
    background-color: #FFFFFF;
    text-align: center;
    text-decoration: none;
}


/* 选择鼠标指针浮动在其上的元素，并设置其样式*/

.register>a:hover,
.register>a:active {
    font-weight: bold;
    color: #647BFF;
    border-bottom: solid 2px #000000;
    text-decoration: none;
}

* {
    padding: 0px;
    margin: 0px;
    list-style: none;
}

.banner {
    width: 800px;
    height: 450px;
    margin: 30px auto;
    border: 1px solid #808080;
    position: relative;
    overflow: hidden;
    background-color: #DCDCDC;
}

.banner .img {
    width: 8000px;
    position: absolute;
    left: 0px;
    top: 0px;
}

.banner .img img {
    width: 800px;
    height: 450px;
}

.banner .img li {
    float: left;
}

.banner .num {
    position: absolute;
    width: 100%;
    bottom: 10px;
    left: 0px;
    text-align: center;
    font-size: 0px;
}

.banner .num li {
    width: 10px;
    height: 10px;
    background-color: #888;
    border-radius: 50%;
    display: inline-block;
    margin: 0px 3px;
    cursor: pointer;
}

.banner .num li.on {
    background-color: #ff6a00;
}

.banner .btn {
    width: 30px;
    height: 50px;
    background-color: #808080;
    /* 设置透明度 */
    opacity: 0.5;
    /* 设置滤镜 */
    filter: alpha(opacity: 0.5);
    position: absolute;
    top: 50%;
    margin-top: -25px;
    cursor: pointer;
    text-align: center;
    line-height: 50px;
    font-size: 40px;
    color: #fff;
    font-family: "宋体";
    display: none;
}

.banner .btn_l {
    left: 0px;
}

.banner .btn_r {
    right: 0px;
}

.banner:hover .btn {
    display: block;
}

#logout {
    position: absolute;
    top: 100%;
    /* right: -20%; */
    width: max-content;
    min-width: 120px;
    text-align: left;
    display: none;
    background-color: #fff;
    box-shadow: 2px 2px 8px #d4d4d4, -2px 2px 8px #d4d4d4;
    border-radius: 4px;
}

.logout_top {
    background-color: #6a7f7a;
    padding: 7px;
    border-radius: 4px 4px 0 0;
}

.logout_user {
    color: #fff;
    font-size: 25px;
    font-weight: bold;
    padding: 7px;
}

.logout_id {
    color: #e8e8e8;
    font-size: 15px;
    padding: 15px 15px 15px 7px;
}

.logout_option {
    padding: 10px 0;
    margin: 8px 0 0 0;
    background-color: #fff;
}

.logout_option:hover {
    background-color: #f0f0f0;
}

.logout_option>a {
    display: block;
    width: 100%;
    height: auto;
    padding: 0 17px;
    color: #6a7f7a;
    text-decoration: none;
}

.logout_option>a:active {
    color: #647BFF;
    text-decoration: none;
    border-bottom-width: 0;
}